Crusher - Wikipedia. A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. ... The earliest crushers were hand-held stones, where the weight of the stone provided a boost to muscle power, used against a stone anvil. .....
Effects of stone crushing industry on Shorea robusta and Madhuca ... The aim of this study was to evaluate the effect of stone crushing industry on .... pollution around stone crusher units at Lalpahari forest area and their effects on ..... in concentration of chlorophyll in plants in the vicinity of cement factories.
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